System of subirrigation.



W. N. ROBISON.

SYSTEM 0F SUBIRRIGATION.

APPLIUATION FILED JAN.24,1911.

1,015,401 Patented .1311.211913 W/YYVESSES [NI/ENTOR WILLIAM N.' nonison', or CANYON, TEXAS.

SYSTEM 0F SUBIRRIGATION.

Apploation led January 24, 1911.' Serial No. 604,464.

Specication of Letters Patent.

Patented Jan. 23,1912.

To all whom "it may concern.'

Be it known thatv I, WILLIAM N. RonisoN, a citizen ofthe United States, residing at Canyon, in thecounty of Randall and State of Texas, have invented certain new and useful Improvements in Systems .of Subirrigation, of which the following is a speciiication, reference being had therein to the accompanying drawing.

This inventionrelates to subirrigation ofland and has for its object to provide an improved system of subirrigation in which pipes are employed formed of coiled wire having seams between its coils separable under pressure in the pipe. f

The invention further has for its object to provide such an improvedsystem of sub-irrigation of land that the land in which the pipes constructed in accordance with this invention are located will be thoroughly and eectively irrigated, said pipes being prevented from being choked up by roots and other matter.

The invention furtherl has for its object to provide an improved system of subirrigation of land embodying the arrangement of a number of sections of pipes'formed of expansible tubes of coiled wire having seams between the coils separable under internal pressure in the pipe in conjunction with a water supply main.

Referring to the accompanying drawing: Figure 1 is a plan View showing a portion of several sub-irrigation pipes, showing ther sub-irrigation system constructed in accordance with this invention and embedded in the ground, andv in longitudinal section a cement tile partly broken away and connected with said pipes. Fig. 2 is a detail Viewin longitudinal section of the adjacent ends of a portion ofitwo sub-irrigation pipes constructed in accordance with this invention and coupled together. Fig. 3 is a detail view showing the end of a sub-irrigation pipe constructed in accordance with this invention and the manner of the passage of water throughsaid pipe.

In carrying out this invention sub-irrigation pipes 1 are provided, each of which is formed of wire 2 of appropriate size, preferably ranging from 2 inches down, as for example, from No. 12 wire to No. 17 wire. The pipes 1 are preferably each formed of a length of wire containing about 100 pounds of wire, and preferably of galvanized iron so as not to rust. The coils of the pipes 1 so lpling the lengths of the pipe together.

formed will yield to "certain internal pres-i surek ofwater therein so as to permit of the passage of waterk between said coils, the openings formed by .the separation of the coils being suilicient for theproper distribution of water tothe surrounding earth, but

not wide enough to admit ofrootsandbther foreign matter.

coupled together in any suitable manner, and, as here shown, 4preferably by means of a coupling 3 which is a short tube of wire a i In using these pipes they` are preferably formed in sections of pipe little larger than the pipes which it couples.

The pipes .1, of whichthere are a-number coupled together, by the couplings 3, are connected to a transverse tile 4, preferably of cement on account of cheapness, said tile having holes in which the ends of the sections of pipe 1 are tted.

The^ invention is advantageous.v in that it can be kmade very rapidly by machinery and at little cost. It can also be rapidly laid by machinery, delays only occurring in cou- It is comparatively light, which lessens the cost of shipping and handling. It fdistributes water evenly, as it can ooze out between the close that roots n cannot get into the pipe,

kthereby overcoming the vgreat difficulty encountered in sub-irrigation. The pipes will not besaflected by freezing andthere will bel no kloss from breaking. By meansy of the construction of the pipe hereinbefore 'de-v scribed a large amounti ofwater can be supplied and distributed. v

Infcarrying out the invention Vthepipes areglaid in the ground with the earthy loosely placed" about them so as to' permitof longitudinall or slightly ybuckling movement Adue to the pressure of the water inthe pipe.

The soil in which the `pipes, arelaid isnotv packed closely about the same to prevent the dischargeof water out of the pipe, and the coils of wire which are, at the same time, so A- l pipes are free to adjust themselves to any irregularity arising from the water pressure therein. f l

Having described the invention, what I- `claim as new is:

1. A system of subirrigation comprising coiled-wire having seams between its coils separable under internal pressure 1n thepipe,

and a `water supply main connected with.

pipes, each formed of an expansibletube of"y described V'ooinlijrising a pipe for sublirriga` tion formed in sections of elastic coiled Wire, the coils of said sections being normally held together and separable under internal pressure in the pipe, said sections of pipe being coupled together. 3. A system of sub-irrigation of the kind described comprising a pipe for sub-irrigation formed in sections of pipe composedof yielding coiled Wire having its coils normally closed together and separable under internal pressure in the pipe to form openings for the distribution of Water, and a coupling connecting the ends of said pipes, and formed of a short tube of coiled Wire.

4. A system of sub-irrigation of the kind described comprising a Water supply main formed with. openings located at intervals apart, and a number of sub-irrigation pipes, said pipes being each connected at one end With an opening in said Water supply main and each of said pipes being formed of coiled Wire having its coils normally pressed together, and separable -under internal pressure in the pipe to form openings for the distribution of Water.

In testimony whereof I hereunto aiiix my signature in presence of tvvo Witnesses.

WILLIAM N. ROBISON. Witnesses:

E. J. BELL, GEO. A. BRANDON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C. 

